Added GitHub init (#5317)

- Added github:init to allow full import, as opposed to gitHub:sync
which allows partial sync and therefore respecting Github API Limit
quota.

---------

Co-authored-by: Ady Beraud <a.beraud96@gmail.com>

packages/twenty-website/src/github/contributors/fetch-assignable-users.tsx

@@ -0,0 +1,21 @@
+import { graphql } from '@octokit/graphql';
+
+import { Repository } from '@/github/contributors/types';
+
+export async function fetchAssignableUsers(
+  query: typeof graphql,
+): Promise<Set<string>> {
+  const { repository } = await query<Repository>(`
+      query {
+        repository(owner: "twentyhq", name: "twenty") {
+          assignableUsers(first: 100) {
+            nodes {
+              login
+            }
+          }
+        }
+      }
+    `);
+
+  return new Set(repository.assignableUsers.nodes.map((user) => user.login));
+}